Design and lightweight material selection ideas for large-span steel structures of large sports venues

Sports venues are typical large-span, large space, and high pedestrian public buildings, covering various types such as basketball courts, badminton courts, comprehensive sports halls, and track and field venues. The core requirements are column free open spaces, large coverage areas, high structural safety redundancy, strong seismic and wind resistance performance, while also considering building aesthetics, sound insulation and heat insulation, durability and safety. Traditional concrete structures cannot achieve column free spaces with a span of up to 100 meters. Steel structures, with their light weight, high strength, strong plasticity, and outstanding span advantages, have become the only mainstream structural form for sports venues. Hongsheng Steel Structure Group is deeply involved in the field of large-span public venues, forming a mature integrated system of large-span steel structure design, material selection, and construction, suitable for various use scenarios such as professional events, national fitness, and cultural performances.

At the design level, the group's core design philosophy is "large-span column free, high stability and anti vibration, beautiful appearance, and sufficient safety redundancy". According to the scale and function of the venue, mature large-span systems such as spatial grid, truss structure, and beam string structure are flexibly adopted to easily achieve full coverage column free space ranging from tens of meters to hundreds of meters. The interior of the venue is unobstructed and has a wide view, fully meeting the requirements of event venue layout, audience seating arrangement, and large-scale equipment layout. During the design phase, professional mechanical simulations are used to accurately calculate wind loads, snow loads, densely populated live loads, and seismic loads. The focus is on optimizing the stress distribution of the roof structure, balancing overall stiffness and self weight, and eliminating problems such as deformation, sagging, and shaking of large-span roofs. At the same time, taking into account architectural aesthetics, customized curved, arc-shaped, and irregular roof structures can be created based on the overall shape of the venue, creating a landmark sports venue that combines practicality and aesthetics. In addition, synchronous optimization of venue acoustics, lighting, drainage, and ventilation structures to adapt to professional usage standards for sports events.

The material selection process takes into account four core elements: high strength, lightweight, high toughness, and high stability. Q355B high-strength low-alloy steel is preferred for the main large-span grid and truss components. Compared with ordinary steel, it has higher strength, lighter weight, and excellent toughness. It can ensure the stability of the large-span structure while reducing the overall load on the roof, effectively reducing the cost of foundation and the risk of structural deformation. For super large landmark sports venues and venues in coastal areas with frequent wind and snow, Q460 high-strength steel will be upgraded to further enhance the structural load resistance and deformation resistance, and adapt to extreme weather conditions. All core load-bearing components and splicing nodes shall be upgraded uniformly to eliminate structural hazards caused by insufficient material specifications.

The selection of supporting materials focuses on venue usage experience and long-term durability. The roof enclosure is made of lightweight, high-strength, waterproof, weather resistant, soundproof and heat-insulating specialized roof panels, combined with high-quality insulation and sound insulation layers, effectively reducing venue noise, stabilizing indoor temperature, and adapting to the needs of events, training, and performances. Anticorrosion and fire protection materials shall be selected according to the building standards of public large space. The main components shall adopt a long-term weather resistant anti-corrosion coating system. The roof and exposed components shall strengthen the anti ultraviolet and anti-aging process to resist long-term sun and rain erosion; The fire protection system adopts ultra-thin and thin fireproof coatings that are suitable for large spaces, balancing fire resistance performance and venue aesthetics. All connection nodes adopt a high-strength bolt special connection system, which has high precision and strong fastening, ensuring the overall coordinated force bearing of large-span structures.

The steel structure engineering technology threshold for large-span sports venues is high, with strict precision requirements, and extremely high demands on the overall industry chain strength of enterprises. Hongsheng Steel Structure Group is a large-scale enterprise engaged in the production of steel structural materials and construction of steel structures, with subsidiaries both domestically and internationally. The group has the independent production and fabrication capability of large-scale large-span trusses, irregular trusses, and ultra high span steel components. Relying on precision CNC equipment and factory pre assembly technology, it ensures zero deviation landing of complex components. We have a professional large-span venue design team and a senior construction team, proficient in the design of various sports venue structural systems, high-altitude assembly, and overall improvement construction techniques. Collaborating with domestic and overseas subsidiaries, we undertake steel structure projects for various small and medium-sized sports venues, as well as large-scale comprehensive sports venues, both domestically and internationally, to create numerous high-quality and high reputation benchmark projects for public sports buildings.

The construction of steel structures for sports venues is a comprehensive reflection of structural mechanics, material selection, and construction technology. With a mature large-span design and material selection system, the group perfectly balances the four core requirements of space, safety, aesthetics, and durability, and assists in the high-quality construction of national fitness venues and professional event venues.

Extended question answer

Q: Will the roof of a large-span steel structure sports arena sag and deform after long-term use?

Answer: Venues with formal design, qualified materials, and standardized construction will not show significant sagging. During the design phase, a pre arch amount will be reserved, and high-strength and tough steel will be used for material selection. The assembly accuracy will be strictly controlled during construction, and regular operation and maintenance inspections will be carried out to maintain the flatness and stability of the roof for a long time and prevent deformation and sagging problems.